features:<br />-- 100%  and high quality.<br />-- deformation rebound rate， long service life.<br />-- waterproof， anti- moisture， good air permeability.<br />-- 2&quot; pyramid foam is most effective on mid-to-high frequency ranges.<br />-- anywhere to help block sound and prevent echoes inside the room.<br />-- these wall panels provides strong noise reduction， good for studios， recording<br />studios， vocal booths， control rooms.<br />-- effective against standing waves and flutter echoes in most small-to-medium sized<br />rooms.<br /><br />- use: perfect for use on corner walls， corner ceilings， etc.<br /><br />specifications:<br />material: polyurethane foam<br />size:35*35*5cm/14*14*2&quot;<br />color: black， coffee， blue， yellow， red<br />quantity: 4/5/6pcs<br /><br />product care: ocnal vacuuming of dust<br /><br />application:<br />family noise control (walls， pipes， ceilings， etc.)<br />workplace noise control (light walls， partitions， conference rooms， etc.)<br />entertainment noise control (ktv rooms， walls， ceilings， floors， etc.)<br />industrial noise control (factory walls， roofs， equipment， doors， control room， etc.)<br /><br />packaged included:<br />4/5/6 x soundproofing foam